CVE-2026-53791: rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header

Overview

Severity

Critical (CVSS 9.1)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit Status

Not Exploited

Patch Tuesday

2026-Aug

Released

2026-08-23

EPSS Score

0.47% (percentile: 39.0%)

Affected Products (1)

Other

• 21597-17084

Revision History

• 2026-08-23: Information published.